/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.sql

import java.lang.reflect.ParameterizedType

import scala.reflect.runtime.universe.TypeTag
import scala.util.Try

import org.apache.spark.annotation.Stable
import org.apache.spark.api.python.PythonEvalType
import org.apache.spark.internal.Logging
import org.apache.spark.sql.api.java._
import org.apache.spark.sql.catalyst.{JavaTypeInference, ScalaReflection}
import org.apache.spark.sql.catalyst.analysis.FunctionRegistry
import org.apache.spark.sql.catalyst.expressions.{Expression, ScalaUDF}
import org.apache.spark.sql.execution.aggregate.ScalaUDAF
import org.apache.spark.sql.execution.python.UserDefinedPythonFunction
import org.apache.spark.sql.expressions.{SparkUserDefinedFunction, UserDefinedAggregateFunction, UserDefinedFunction}
import org.apache.spark.sql.types.DataType
import org.apache.spark.util.Utils

/**
 * Functions for registering user-defined functions. Use `SparkSession.udf` to access this:
 *
 * {{{
 *   spark.udf
 * }}}
 *
 * @since 1.3.0
 */
@Stable
class UDFRegistration private[sql] (functionRegistry: FunctionRegistry) extends Logging {

  protected[sql] def registerPython(name: String, udf: UserDefinedPythonFunction): Unit = {
    log.debug(
      s"""
        | Registering new PythonUDF:
        | name: $name
        | command: ${udf.func.command.toSeq}
        | envVars: ${udf.func.envVars}
        | pythonIncludes: ${udf.func.pythonIncludes}
        | pythonExec: ${udf.func.pythonExec}
        | dataType: ${udf.dataType}
        | pythonEvalType: ${PythonEvalType.toString(udf.pythonEvalType)}
        | udfDeterministic: ${udf.udfDeterministic}
      """.stripMargin)

    functionRegistry.createOrReplaceTempFunction(name, udf.builder)
  }

  /**
   * Registers a user-defined aggregate function (UDAF).
   *
   * @param name the name of the UDAF.
   * @param udaf the UDAF needs to be registered.
   * @return the registered UDAF.
   *
   * @since 1.5.0
   */
  def register(name: String, udaf: UserDefinedAggregateFunction): UserDefinedAggregateFunction = {
    def builder(children: Seq[Expression]) = ScalaUDAF(children, udaf)
    functionRegistry.createOrReplaceTempFunction(name, builder)
    udaf
  }

  /**
   * Registers a user-defined function (UDF), for a UDF that's already defined using the Dataset
   * API (i.e. of type UserDefinedFunction). To change a UDF to nondeterministic, call the API
   * `UserDefinedFunction.asNondeterministic()`. To change a UDF to nonNullable, call the API
   * `UserDefinedFunction.asNonNullable()`.
   *
   * Example:
   * {{{
   *   val foo = udf(() => Math.random())
   *   spark.udf.register("random", foo.asNondeterministic())
   *
   *   val bar = udf(() => "bar")
   *   spark.udf.register("stringLit", bar.asNonNullable())
   * }}}
   *
   * @param name the name of the UDF.
   * @param udf the UDF needs to be registered.
   * @return the registered UDF.
   *
   * @since 2.2.0
   */
  def register(name: String, udf: UserDefinedFunction): UserDefinedFunction = {
    def builder(children: Seq[Expression]) = udf.apply(children.map(Column.apply) : _*).expr
    functionRegistry.createOrReplaceTempFunction(name, builder)
    udf
  }

  // scalastyle:off line.size.limit

  /* register 0-22 were generated by this script

    (0 to 22).foreach { x =>
      val types = (1 to x).foldRight("RT")((i, s) => {s"A$i, $s"})
      val typeTags = (1 to x).map(i => s"A$i: TypeTag").foldLeft("RT: TypeTag")(_ + ", " + _)
      val inputSchemas = (1 to x).foldRight("Nil")((i, s) => {s"Try(ScalaReflection.schemaFor[A$i]).toOption :: $s"})
      println(s"""
        |/**
        | * Registers a deterministic Scala closure of $x arguments as user-defined function (UDF).
        | * @tparam RT return type of UDF.
        | * @since 1.3.0
        | */
        |def register[$typeTags](name: String, func: Function$x[$types]): UserDefinedFunction = {
        |  val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
        |  val inputSchemas: Seq[Option[ScalaReflection.Schema]] = $inputSchemas
        |  val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
        |  val finalUdf = if (nullable) udf else udf.asNonNullable()
        |  def builder(e: Seq[Expression]) = if (e.length == $x) {
        |    finalUdf.createScalaUDF(e)
        |  } else {
        |    throw new AnalysisException("Invalid number of arguments for function " + name +
        |      ". Expected: $x; Found: " + e.length)
        |  }
        |  functionRegistry.createOrReplaceTempFunction(name, builder)
        |  finalUdf
        |}""".stripMargin)
    }

    (0 to 22).foreach { i =>
      val extTypeArgs = (0 to i).map(_ => "_").mkString(", ")
      val anyTypeArgs = (0 to i).map(_ => "Any").mkString(", ")
      val anyCast = s".asInstanceOf[UDF$i[$anyTypeArgs]]"
      val anyParams = (1 to i).map(_ => "_: Any").mkString(", ")
      val version = if (i == 0) "2.3.0" else "1.3.0"
      val funcCall = if (i == 0) s"() => f$anyCast.call($anyParams)" else s"f$anyCast.call($anyParams)"
      println(s"""
        |/**
        | * Register a deterministic Java UDF$i instance as user-defined function (UDF).
        | * @since $version
        | */
        |def register(name: String, f: UDF$i[$extTypeArgs], returnType: DataType): Unit = {
        |  val func = $funcCall
        |  def builder(e: Seq[Expression]) = if (e.length == $i) {
        |    ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
        |  } else {
        |    throw new AnalysisException("Invalid number of arguments for function " + name +
        |      ". Expected: $i; Found: " + e.length)
        |  }
        |  functionRegistry.createOrReplaceTempFunction(name, builder)
        |}""".stripMargin)
    }
    */

  /**
   * Registers a deterministic Scala closure of 0 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag](name: String, func: Function0[RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 0) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 0; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 1 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag](name: String, func: Function1[A1, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 1) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 1; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 2 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag](name: String, func: Function2[A1, A2, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 2) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 2; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 3 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag](name: String, func: Function3[A1, A2, A3, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 3) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 3; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 4 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag](name: String, func: Function4[A1, A2, A3, A4, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 4) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 4; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 5 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag](name: String, func: Function5[A1, A2, A3, A4, A5, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 5) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 5; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 6 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag](name: String, func: Function6[A1, A2, A3, A4, A5, A6, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 6) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 6; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 7 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag](name: String, func: Function7[A1, A2, A3, A4, A5, A6, A7, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 7) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 7; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 8 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag](name: String, func: Function8[A1, A2, A3, A4, A5, A6, A7, A8, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 8) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 8; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 9 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag](name: String, func: Function9[A1, A2, A3, A4, A5, A6, A7, A8, A9, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 9) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 9; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 10 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag](name: String, func: Function10[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 10) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 10; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 11 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag](name: String, func: Function11[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 11) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 11; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 12 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag](name: String, func: Function12[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 12) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 12; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 13 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag](name: String, func: Function13[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 13) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 13; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 14 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag](name: String, func: Function14[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 14) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 14; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 15 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag](name: String, func: Function15[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 15) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 15; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 16 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag](name: String, func: Function16[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 16) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 16; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 17 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag](name: String, func: Function17[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 17) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 17; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 18 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag](name: String, func: Function18[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Try(ScalaReflection.schemaFor[A18]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 18) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 18; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 19 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag](name: String, func: Function19[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Try(ScalaReflection.schemaFor[A18]).toOption :: Try(ScalaReflection.schemaFor[A19]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 19) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 19; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 20 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag](name: String, func: Function20[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Try(ScalaReflection.schemaFor[A18]).toOption :: Try(ScalaReflection.schemaFor[A19]).toOption :: Try(ScalaReflection.schemaFor[A20]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 20) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 20; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 21 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag](name: String, func: Function21[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Try(ScalaReflection.schemaFor[A18]).toOption :: Try(ScalaReflection.schemaFor[A19]).toOption :: Try(ScalaReflection.schemaFor[A20]).toOption :: Try(ScalaReflection.schemaFor[A21]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 21) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 21; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  /**
   * Registers a deterministic Scala closure of 22 arguments as user-defined function (UDF).
   * @tparam RT return type of UDF.
   * @since 1.3.0
   */
  def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag, A22: TypeTag](name: String, func: Function22[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, RT]): UserDefinedFunction = {
    val ScalaReflection.Schema(dataType, nullable) = ScalaReflection.schemaFor[RT]
    val inputSchemas: Seq[Option[ScalaReflection.Schema]] = Try(ScalaReflection.schemaFor[A1]).toOption :: Try(ScalaReflection.schemaFor[A2]).toOption :: Try(ScalaReflection.schemaFor[A3]).toOption :: Try(ScalaReflection.schemaFor[A4]).toOption :: Try(ScalaReflection.schemaFor[A5]).toOption :: Try(ScalaReflection.schemaFor[A6]).toOption :: Try(ScalaReflection.schemaFor[A7]).toOption :: Try(ScalaReflection.schemaFor[A8]).toOption :: Try(ScalaReflection.schemaFor[A9]).toOption :: Try(ScalaReflection.schemaFor[A10]).toOption :: Try(ScalaReflection.schemaFor[A11]).toOption :: Try(ScalaReflection.schemaFor[A12]).toOption :: Try(ScalaReflection.schemaFor[A13]).toOption :: Try(ScalaReflection.schemaFor[A14]).toOption :: Try(ScalaReflection.schemaFor[A15]).toOption :: Try(ScalaReflection.schemaFor[A16]).toOption :: Try(ScalaReflection.schemaFor[A17]).toOption :: Try(ScalaReflection.schemaFor[A18]).toOption :: Try(ScalaReflection.schemaFor[A19]).toOption :: Try(ScalaReflection.schemaFor[A20]).toOption :: Try(ScalaReflection.schemaFor[A21]).toOption :: Try(ScalaReflection.schemaFor[A22]).toOption :: Nil
    val udf = SparkUserDefinedFunction(func, dataType, inputSchemas).withName(name)
    val finalUdf = if (nullable) udf else udf.asNonNullable()
    def builder(e: Seq[Expression]) = if (e.length == 22) {
      finalUdf.createScalaUDF(e)
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 22; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
    finalUdf
  }

  //////////////////////////////////////////////////////////////////////////////////////////////
  //////////////////////////////////////////////////////////////////////////////////////////////

  /**
   * Register a Java UDF class using reflection, for use from pyspark
   *
   * @param name   udf name
   * @param className   fully qualified class name of udf
   * @param returnDataType  return type of udf. If it is null, spark would try to infer
   *                        via reflection.
   */
  private[sql] def registerJava(name: String, className: String, returnDataType: DataType): Unit = {

    try {
      val clazz = Utils.classForName[AnyRef](className)
      val udfInterfaces = clazz.getGenericInterfaces
        .filter(_.isInstanceOf[ParameterizedType])
        .map(_.asInstanceOf[ParameterizedType])
        .filter(e => e.getRawType.isInstanceOf[Class[_]] && e.getRawType.asInstanceOf[Class[_]].getCanonicalName.startsWith("org.apache.spark.sql.api.java.UDF"))
      if (udfInterfaces.length == 0) {
        throw new AnalysisException(s"UDF class $className doesn't implement any UDF interface")
      } else if (udfInterfaces.length > 1) {
        throw new AnalysisException(s"It is invalid to implement multiple UDF interfaces, UDF class $className")
      } else {
        try {
          val udf = clazz.getConstructor().newInstance()
          val udfReturnType = udfInterfaces(0).getActualTypeArguments.last
          var returnType = returnDataType
          if (returnType == null) {
            returnType = JavaTypeInference.inferDataType(udfReturnType)._1
          }

          udfInterfaces(0).getActualTypeArguments.length match {
            case 1 => register(name, udf.asInstanceOf[UDF0[_]], returnType)
            case 2 => register(name, udf.asInstanceOf[UDF1[_, _]], returnType)
            case 3 => register(name, udf.asInstanceOf[UDF2[_, _, _]], returnType)
            case 4 => register(name, udf.asInstanceOf[UDF3[_, _, _, _]], returnType)
            case 5 => register(name, udf.asInstanceOf[UDF4[_, _, _, _, _]], returnType)
            case 6 => register(name, udf.asInstanceOf[UDF5[_, _, _, _, _, _]], returnType)
            case 7 => register(name, udf.asInstanceOf[UDF6[_, _, _, _, _, _, _]], returnType)
            case 8 => register(name, udf.asInstanceOf[UDF7[_, _, _, _, _, _, _, _]], returnType)
            case 9 => register(name, udf.asInstanceOf[UDF8[_, _, _, _, _, _, _, _, _]], returnType)
            case 10 => register(name, udf.asInstanceOf[UDF9[_, _, _, _, _, _, _, _, _, _]], returnType)
            case 11 => register(name, udf.asInstanceOf[UDF10[_, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 12 => register(name, udf.asInstanceOf[UDF11[_, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 13 => register(name, udf.asInstanceOf[UDF12[_, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 14 => register(name, udf.asInstanceOf[UDF13[_, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 15 => register(name, udf.asInstanceOf[UDF14[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 16 => register(name, udf.asInstanceOf[UDF15[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 17 => register(name, udf.asInstanceOf[UDF16[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 18 => register(name, udf.asInstanceOf[UDF17[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 19 => register(name, udf.asInstanceOf[UDF18[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 20 => register(name, udf.asInstanceOf[UDF19[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 21 => register(name, udf.asInstanceOf[UDF20[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 22 => register(name, udf.asInstanceOf[UDF21[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case 23 => register(name, udf.asInstanceOf[UDF22[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]], returnType)
            case n =>
              throw new AnalysisException(s"UDF class with $n type arguments is not supported.")
          }
        } catch {
          case e @ (_: InstantiationException | _: IllegalArgumentException) =>
            throw new AnalysisException(s"Can not instantiate class $className, please make sure it has public non argument constructor")
        }
      }
    } catch {
      case e: ClassNotFoundException => throw new AnalysisException(s"Can not load class $className, please make sure it is on the classpath")
    }

  }

  /**
   * Register a Java UDAF class using reflection, for use from pyspark
   *
   * @param name     UDAF name
   * @param className    fully qualified class name of UDAF
   */
  private[sql] def registerJavaUDAF(name: String, className: String): Unit = {
    try {
      val clazz = Utils.classForName[AnyRef](className)
      if (!classOf[UserDefinedAggregateFunction].isAssignableFrom(clazz)) {
        throw new AnalysisException(s"class $className doesn't implement interface UserDefinedAggregateFunction")
      }
      val udaf = clazz.getConstructor().newInstance().asInstanceOf[UserDefinedAggregateFunction]
      register(name, udaf)
    } catch {
      case e: ClassNotFoundException => throw new AnalysisException(s"Can not load class ${className}, please make sure it is on the classpath")
      case e @ (_: InstantiationException | _: IllegalArgumentException) =>
        throw new AnalysisException(s"Can not instantiate class ${className}, please make sure it has public non argument constructor")
    }
  }

  /**
   * Register a deterministic Java UDF0 instance as user-defined function (UDF).
   * @since 2.3.0
   */
  def register(name: String, f: UDF0[_], returnType: DataType): Unit = {
    val func = () => f.asInstanceOf[UDF0[Any]].call()
    def builder(e: Seq[Expression]) = if (e.length == 0) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 0; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF1 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF1[_, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF1[Any, Any]].call(_: Any)
    def builder(e: Seq[Expression]) = if (e.length == 1) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 1; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF2 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF2[_, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF2[Any, Any, Any]].call(_: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 2) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 2; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF3 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF3[_, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF3[Any, Any, Any, Any]].call(_: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 3) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 3; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF4 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF4[_, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF4[Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 4) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 4; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF5 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF5[_, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF5[Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 5) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 5; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF6 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF6[_, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF6[Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 6) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 6; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF7 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF7[_, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF7[Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 7) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 7; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF8 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF8[_, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF8[Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 8) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 8; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF9 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF9[_, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF9[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 9) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 9; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF10 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF10[_, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF10[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 10) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 10; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF11 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF11[_, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF11[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 11) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 11; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF12 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF12[_, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF12[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 12) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 12; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF13 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF13[_, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF13[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 13) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 13; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF14 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF14[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF14[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 14) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 14; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF15 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF15[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF15[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 15) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 15; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF16 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF16[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF16[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 16) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 16; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF17 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF17[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF17[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 17) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 17; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF18 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF18[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF18[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 18) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 18; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF19 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF19[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF19[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 19) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 19; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF20 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF20[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF20[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 20) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 20; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF21 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF21[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF21[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 21) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 21; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  /**
   * Register a deterministic Java UDF22 instance as user-defined function (UDF).
   * @since 1.3.0
   */
  def register(name: String, f: UDF22[_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _], returnType: DataType): Unit = {
    val func = f.asInstanceOf[UDF22[Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any, Any]].call(_: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any, _: Any)
    def builder(e: Seq[Expression]) = if (e.length == 22) {
      ScalaUDF(func, returnType, e, e.map(_ => false), udfName = Some(name))
    } else {
      throw new AnalysisException("Invalid number of arguments for function " + name +
        ". Expected: 22; Found: " + e.length)
    }
    functionRegistry.createOrReplaceTempFunction(name, builder)
  }

  // scalastyle:on line.size.limit

}
